Bobbin-case for sewing-machines



(No Model.)

G. M. MORRIS.

BOBBIN CAS-B FOR SEWING MACHINES. No. 339,069. Patented Mar. so, 1886.

W 5 INvE-NTQR:

:TNI: sesi /JZZ lUNrTnn STATES PATENT Trice.

GEORGE M. MORRIS, OF OOHOES, ASSIGNOR TO THE NATIONAL MACHINE COMPANY, OF TROY, NEV YORK.

ROBBlN-CASE. FOR SEWlNG-MACHINES.

"ATTON forming part of Letters Patent No. 339,069, dated Miami; 30,1856.

Application filed December 22, 1881. Seri-.xl No. 4&131 (No model.)

To rLZZ whom t may concern.- A and B are the two circular parts of the 'Be it known that I, GEORGE M. MoRRi's, a bohbincase. (l is the bobbin, which has a citizen of the United States, residing in the socket, 7a, that is iitted to turn freely ou an city of (Echoes, in the county of Albany and axial ljournal, h, fast on one part, A., of the 55 5 State of New York, have inventcda new and ease. The two parts A and B have all around useful Improvement in BobbiirGases for Sewtheir peripheries opposite annular bearings Z ing-Machines,ofwhich the followingisaspeciand m, and one of said posts has an axial iication, reference being had to the accompasocket, y, which fits freely upon an axial journying drawings. nal, 1', on the other part, whereby the two 6o 1o rlhis invention relates to improvements in parts are connected together, as shown in Figs. bobbincases of sewing-machines for forming 3, 4, and in such manner that either one of loclestitches by means of a needle and a cothe two parts can he freely rotated upon the acting rotary hook, which carries the needle other part, with their annularbearingsland my thread around a locking-thread from a spoolin contact with each other, and that one of the 6 5 15 like bobbin inclosed on all sides by a case parts can be freely and instantly separated which is in two laterailyseparable circular from and reconnected with the other laterallyr halves or parts, furnished with an axial supin the direction of their common axis. port for the bobbin to freely rotate upon, and In Figs. 1, 2, and 3, D is the revolving hook, gently pressed into a suitable recess in the which hasasnitable reeess,inwhich i'its loosely 7o rotary hook by a spring, in combination with the two-part bobbin-casc A B, which is rea holder for loosely retainingthe bobbincase tained in the recess by the holder E, and the in said recess. spring f, which gently presses against the outer The object of this improvement is to secure side of the bobbin-case in the recess. Vhen a very uniform tension on the stretch of thread the bobbin C is wound with thread, and iu- 75 2 5 from the bobbin by reason of the pressure of serted and supported in the two-part case A the said spring against the two-part bobbin- 3, and the latter is placed in the recess in the casein pressing it into the recess in the rotary rotary hook D, and loosely retained therein by hook while the stretch of bobbin-thread is the holder E and the spring f, substantially being drawn out between any portion whatas shown by Figs. l, 2, and 3, and a stretch, 8o 3o soever ol' the circular peripheries of the two y, of the bobbin-thread extends from the bob halves or parts of the case, and whether much bin outward between and beyond the two anor little thread is on the bobbin. nular bearings Z m of the two parts of the ln the aforesaid drawings, Figure l is an ease, as in forming stitches by the sewingend elevation, Fig. 2 a plan, and Fig. 3 a vermachine, the pressure of the springf against 8 5 35 tical section at about the line z in Figs. 1 the outer part ofthe ease will cause the stretch and 2, of Aa portion of a No 8 Wheeler 8s of bobbin-thread to be gently pressed by and TVilson revolving-hook sewing-machine, hav between the annular bearings l on, so as to ing therein one el' my improved bobbin-cases thereby produce a very uniform tension on inclosing a partly-illed bobbin. Fig. 4 repthe stretch of bobbin-thread as it is drawn 9o 4o resents an edge elevation and a diametrical out between any portion ot' the circuit of the section of a inodiication of one of my imbearings Z m which shall be in proper posiproved bobbin-cases with a partly-filled bobtion in respect to the stitehforming devices of bin therein, and Fig` 5 is asectional elevation the sewing-machine. of the same. Fig. o' shows an edge elevation The degree of pressure, and consequent ten- 95 45 and axial section of the bobbiircasc represion of the bearings Zm against the stretch of sented in Figs. l, 2, and 3; and Fig. 7 shows bobbin thread, can be adjusted by altering edge elevations, and Figs. S and 9 present the degree of pressure of the springf against elevations of the inner and outer sides of the the outer part of the bobbin-case, as by means two parts of the same case. Fig. l() shows in of the usual stop-screw, a, and clampscrew o 10o o edge and side elevations the bobbin repreof the holder F, or by means of any suitable sentedin Figs. 3, Li, and (3. device adapted to increase and lessen the pressure of the spring against the case. The bearings Z m are made to extend all around the two circular parts of the case, and one part of the oase is journaled to turn or rotate freely on the other part, in order that when in use in the sewing-machine, if the rotation of the hook shall turn the contiguous part or both parts of the case, one or both of the bearings Z m can then slip on the stretch of bobbinthread, and thus avoid pulling the latter so far out of its proper course as to materially vary its tension.

In the modification shown by Fig. 4 the outer part, A, of the case has a low projection, p, to rest over the spring f, as indicated in Figs. 1 and 3 by dotted lines at p, to lessen or prevent the rotation of the outer part of the case by the revolving hook, and in Figs. 4 and 5 thel part A of the ease is shown as having holes q, through which the bobbinth'read can be passed, as shown at r, to increase its tension before passing out between the annular bearings Z m'. l

I claim as my invention- 1. A sewing-machine bobbin-case consisting of two circular parts having opposite annular peripheral bearings, an axial journal for a bobbin, an axial socket in one part and corresponding axial journal on the other, and said socket and journal so constructed as to permit free rotation of one part on the other while said annular bearings remain in oontact, and to allow free bodily movement of one part toward and away from the other part, substantially as set forth.

2. In a sewing-machine, the combination, with its recessed revolving hook, bobbin-case holder, and pressing-spring, of a bobbin-case pressed in the revolving hook by said spring, and consisting of two circular parts having opposite annular peripheral bearings, an axial journal for the bobbin, an axial socket in one part and corresponding axial journal on the other, and said socket and journal so constructed as Vto permit free'ibodily movement of one part toward and away from the other, and to allow free rotation of one part on the other part while said annular bearings are in contact, substantially as set forth.

In testimony whereof I hereunto set my hand, in the presence of two subscribing witnesses, this 28th day of April, 1881.

GEORGE M. MORRIS.

Vitnesses: Y

JAMES T. GooDFELLow, J AMEs H. SLADE. 

